2016 was the hottest year on record for the third consecutive year. In a database of more than 5,000 cities provided by AccuWeather, about 90 percent recorded annual mean temperatures higher than normal. Enter your city in the search box to see how much warmer (or cooler) it was.

In 2015, humanity's best images of Pluto were a few fuzzy pixels wide. Pluto was obscured by its vast distance and diminutive size. But no longer. On July 14, NASA's New Horizons spacecraft zipped past Pluto and its moons, scanning the dwarf planet in unprecedented detail. Using data from that...

NASA's Kepler mission has discovered more than 1-000 confirmed planets orbiting distant stars. Planets with a known size and orbit are shown below, including five planets orbiting Kepler 62, announced on April 18